#include <stdio.h>
int main(int argc, char const *argv[])
{
    /*
    printf("横向树状打印二叉树为：\n");
    printf("        K\n");
    printf("          J\n");
    printf("      I\n");
    printf("    H\n");
    printf("      G\n");
    printf("  F\n");
    printf("E\n");
    printf("    D\n");
    printf("      C\n");
    printf("  B\n");
    printf("    A\n");
    */
    printf("二叉树叶子结点个数为：\n");
    printf("4");
}